觸發電路模組由四個鑒別器和四個「與」門電路組成，可依據需要而改變組合型式。原型設計成二元「與」門電路，而每個訊號分別產生自一組兩塊重疊的探測器。當每組探測器分別同時產生訊號，該電路便會觸發數據收集。

The trigger electronic module consists of 4 discriminators and 4 coincidence unit which can be modified into different combinations. It is designed so that 2 signals are acquired as both are generated from coincided signals from 2 overlapped detectors correspondingly.

相關內容 related page: 測試實驗─局域觀測空氣簇射 Trial Experiment: Local EAS